symboltable.cpp

来自「an easy compiler to compile C」· C++ 代码 · 共 41 行

// SymbolTable.cpp: implementation of the SymbolTable class.
//
//////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "SymbolTable.h"


SymbolTable symbol_table;

SymbolTable::SymbolTable() {

	//prestore a set of keywords (reserved words)
	table.push_back(SymbolEntry("div", Token::DIV));
	table.push_back(SymbolEntry("mod", Token::MOD));
}

int SymbolTable::find(const string& alexeme) const {

	int i=0;
	int size = table.size();
	for(; i< size && table[i].lexeme != alexeme; ++i) {}
	return i< size ? i: -1;
}

int SymbolTable::append(const SymbolEntry& se) {

	table.push_back(se);
	return table.size() -1;
}

Token SymbolTable::getToken(int index) const {

	return Token((table[index]).token_type, index);	 
}

string SymbolTable::getLexeme(int index) const {

	return table[index].lexeme;
}